  

function pageTo(){
       
	  var num = document.getElementById("jumpNum").value;
	  var url = document.getElementById("pageUrl").value;
	  var totalNum = document.getElementById("totalNum").value;
	 
	  if(num > totalNum){
		  alert("the page number is undefind!");
		  return false;  
	  }
	  if("" == url || null == url){
		  alert("please input page url!");
		  return false;  
	  }
	  if("" == num || null == num){
        alert("please input page number!");
		return false;
	   }
	  self.location=url + '&pageNum=' + num;
	}